server/container/guice/protocols/pop/src/main/java/org/apache/james/modules/protocols/POP3ServerModule.java

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package org.apache.james.modules.protocols;

import org.apache.james.pop3server.netty.OioPOP3ServerFactory;
import org.apache.james.pop3server.netty.POP3ServerFactory;
import org.apache.james.server.core.configuration.ConfigurationProvider;
import org.apache.james.utils.GuiceProbe;
import org.apache.james.utils.InitializationOperation;
import org.apache.james.utils.InitilizationOperationBuilder;

import com.google.inject.AbstractModule;
import com.google.inject.Scopes;
import com.google.inject.multibindings.Multibinder;
import com.google.inject.multibindings.ProvidesIntoSet;

public class POP3ServerModule extends AbstractModule {
    @Override
    protected void configure() {
        bind(POP3ServerFactory.class).in(Scopes.SINGLETON);
        bind(OioPOP3ServerFactory.class).in(Scopes.SINGLETON);

        Multibinder.newSetBinder(binder(), GuiceProbe.class).addBinding().to(Pop3GuiceProbe.class);
    }

    @ProvidesIntoSet
    InitializationOperation configurePop3(ConfigurationProvider configurationProvider, POP3ServerFactory pop3ServerFactory) {
        return InitilizationOperationBuilder
            .forClass(POP3ServerFactory.class)
            .init(() -> {
                pop3ServerFactory.configure(configurationProvider.getConfiguration("pop3server"));
                pop3ServerFactory.init();
            });
    }
}